CVE-2021-29484

    Dashboard / Vulnerabilities / CVE-2021-29484

    CVE-2021-29484

    Published: 29 Apr 2021Last Modified: 7 Aug 2026

    Summary:

    Details: Ghost is a Node.js CMS. An unused endpoint added during the development of 4.0.0 has left sites vulnerable to untrusted users gaining access to Ghost Admin. Attackers can gain access by getting logged in users to click a link containing malicious code. Users do not need to enter credentials and may not know they've visited a malicious site. Ghost(Pro) has already been patched. We can find no evidence that the issue was exploited on Ghost(Pro) prior to the patch being added. Self-hosters are impacted if running Ghost a version between 4.0.0 and 4.3.2. Immediate action should be taken to secure your site. The issue has been fixed in 4.3.3, all 4.x sites should upgrade as soon as possible. As the endpoint is unused, the patch simply removes it. As a workaround blocking access to /ghost/preview can also mitigate the issue.

    References: https://forum.ghost.org/t/critical-security-update-available-for-ghost-4-x/22290, https://github.com/TryGhost/Ghost/security/advisories/GHSA-9fgx-q25h-jxrg, https://www.npmjs.com/package/ghost, https://blog.sonarsource.com/ghost-admin-takeover

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 6058ee39069f83c698cc0c8d4492a4dfd2c4eed2
    Fixed -8f3fbfb79de537c04c645b57ebe9d892caf46c34

    Affected versions

    v4.3.2
    v4.3.1
    v4.3.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-29484 | CVE-DB